e30 m60b40 1/4 mile times!!

[st.petebiodiesel]

My e30 m60b40 swap did a 9.1 at 81 mph in the 1/8, was kinda disappointed because the car feels much faster. I'm running the 5spd 320 zf with a 3.15 torsen diff and it feels like i'm always shifting. my 3rd gear red lines at 75 mph. I have to shift into fourth before i reach the finish line. I'm going to try to take it to a 1/4 mile since i should be able to keep it in fourth for the extra 1/8. I don't have a tach setup right now, I just know what speed the engine cuts so i shift right before that speed.

[e30polak]

At the strip now. Car is 2820lbs without me. I'm 150lbs.

M60b44 hybrid running 404 DME with normal m60 Mark D tune. 3.25 LSD and 235/40/17 sumitumo HTRZII's.

Best so far is 13.099@107.21 with a 2.018 60'.

Previous best was 13.28@103.5 with a 1.94 60' with the m60b40/2.93 LSD

It's good for a 12.9. I just stripped 60+lbs of crap, I'm going back out now and going for it!

EDIT: Did not hit 12's. Bummer.

Get some 15s or 16s with sticky tires and taller sidewalls out back for the strip and you should do a lot better

[JGood]

At the strip now. Car is 2820lbs without me. I'm 150lbs.

M60b44 hybrid running 404 DME with normal m60 Mark D tune. 3.25 LSD and 235/40/17 sumitumo HTRZII's.

Best so far is 13.099@107.21 with a 2.018 60'.

Previous best was 13.28@103.5 with a 1.94 60' with the m60b40/2.93 LSD

It's good for a 12.9. I just stripped 60+lbs of crap, I'm going back out now and going for it!

EDIT: Did not hit 12's. Bummer.

[digger]

Got back to the track last night, after getting my car straightened out finally. I'm now running a Mark D chip, which fixed all of my issues. Unfortunately, it was so full that I only got 2 runs in. My second run was good, my best 60' to date, but the trap speed still seems a little low (although they are better then they were with the bad chip). It may be my 2.93 gearing. I'm shifting into fourth right before the line.





I also re-weighed my car. Last time it was 2680. This time it was 2780. Both times were a half tank, spare tire and jack still in the trunk, without me in the car. Not sure what's up with that. This is an NHRA track, so it should be calibrated frequently. Anyway, my car was 2945 last night with me in it, if the scale was correct.

I'd also like to point out that a 1.92 60' feels amazing. It's a lot different then a 2.0-2.1. It throws you back in the seat hard, I wasn't ready for it at all. I can't imagine these guys pulling off 1.5-1.6 or even better, that must feel awesome haha.

with 2780lb no driver that trapspeed shows 250-260bhp as a ballpark number which might not be far off what a stock M60 with decent miles on it makes?

[Jean]

Thumbs up! Getting a really good 60ft does wonders as you said! Maybe I'll contact Mark D for my chip as well ! How do you like it?

Is there a race shop near-by with corner-weight scales? Maybe take your car there instead to get the weight measured... :)

That's what I did with mine when it tipped the scales at 250x with half a tank .

[JGood]

Got back to the track last night, after getting my car straightened out finally. I'm now running a Mark D chip, which fixed all of my issues. Unfortunately, it was so full that I only got 2 runs in. My second run was good, my best 60' to date, but the trap speed still seems a little low (although they are better then they were with the bad chip). It may be my 2.93 gearing. I'm shifting into fourth right before the line.





I also re-weighed my car. Last time it was 2680. This time it was 2780. Both times were a half tank, spare tire and jack still in the trunk, without me in the car. Not sure what's up with that. This is an NHRA track, so it should be calibrated frequently. Anyway, my car was 2945 last night with me in it, if the scale was correct.

I'd also like to point out that a 1.92 60' feels amazing. It's a lot different then a 2.0-2.1. It throws you back in the seat hard, I wasn't ready for it at all. I can't imagine these guys pulling off 1.5-1.6 or even better, that must feel awesome haha.

[The Dark Side of Will]

I was going to ask if you had photos of the headers...

//

For comparison, my Fiero weighs just a hair under 2900, had 255 RWHP and ran 12.86 @ 106 with 1.92 sixty.

[ouwi]

How's traction with the 3.46? I guess pretty good if you pulled a 1.94 60'. Any pics of your headers?

Traction is ok, for those cheap Nankang street tires. But hopefully next time i have something better..
I don't have pictures of those headers, but both sides are 4-2-1 style and they goes like this: Primary 15"+4"collectors ID 1.45. Secondary 21"+6"collectors ID 1.88". Tailpipe before first silencer is about 25" long ID 2.12".

Sorry my bad english..

[JGood]

Hi..

e30 touring 2820lbs, m60b40 with chip, long home made 8-4-2 headers, e36 m3 OEM exhaust without cats, s6s420g, Diff 3.46, 235/40-17 Nankang tyres.

ET 13.25
MPH 105.7
60' 1.94

FINALLY, another e30 m60 1/4 mile time! Thanks for posting.

You trapped 5mph faster then me. I need to get back to the track now that mine is running right and see if I can match your speed. I'm running a 2.93 so I don't know if I'd be able to.

How's traction with the 3.46? I guess pretty good if you pulled a 1.94 60'. Any pics of your headers?

[ouwi]

Hi..

e30 touring 2820lbs, m60b40 with chip, long home made 8-4-2 headers, e36 m3 OEM exhaust without cats, s6s420g, Diff 3.46, 235/40-17 Nankang tyres.

ET 13.25
MPH 105.7
60' 1.94

[kevinbednarek]

I've got the M62 in my '84 with what I was told is a 2.93 diff. I have my doubts because the gears seem really short. But I don't grip very nicely in 1st and 2nd. So I'd assume my quarter time isn't all that impressive. But damn if it isn't fun to drive..

[Jean]

that's what i'm thinking. I'm going to recheck compression, and pick up the timing tools. If i don't get it sorted by the end of this summer, i'm buying a different m60, and an m62, building a hybrid, and not using a single nut or bolt from my current setup. And if i still have my issues after that, i'm going to jump off a bridge.

s65!

[dirty30]

and if i still have my issues after that, i'm going to jump off a bridge.

lol

[JGood]

I did some reading, and if you subtract your 1320' time from your 330' time, you get a good indication of your power consistency without the traction factor. This year, my 330'-1320' were all 7.92-7.99. Last year, they were 7.86-7.89. I'm guessing that's the difference between the 2.93 and 3.25, the torque multiplication. If I add my best 330' from this year, when I was hooking up, to my best 330'-1320' time from last year, when I had the 3.25, I get a 13.498. The 3.25 was not the reason I wasn't hooking up, it was track prep (or lack thereof). So, theoretically, the difference between the 3.25 and 2.93 is worth about .1-.2 seconds and 1-2 MPH.

I don't really care about drag racing, my car certainly wasn't built to drag race, I just really like getting the data and seeing how changes you make affect acceleration. I would have thought that a diff ratio change would do a lot more then what my times show.

Maybe the low trap speed and the stalling are pointing to a compression or base timing issue?

That's what I'm thinking. I'm going to recheck compression, and pick up the timing tools. If I don't get it sorted by the end of this summer, I'm buying a different m60, and an m62, building a hybrid, and not using a single nut or bolt from my current setup. And if I still have my issues after that, I'm going to jump off a bridge.

[dirty30]

Maybe the low trap speed and the stalling are pointing to a compression or base timing issue?